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USAFCharger
 
  Question 04 Durango 5.7L Chatter - Posted: 01-13-2011, 03:55 PM
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Post #1

My wife got in her truck one mornign last month to go to work. She came in telling me it wouldn't start. It was cold and the truck hadn't been run all weekend. I figured it was the battery at first. Went to check for myself, and the starter was was attempting to turn the engine over. Tried it a couple more times and the engine finally turned over and started, but the engine had a wicked chatter that increased as the engine RPM increased. I checked the oil and it was a quart or so low. I figured the chatter would go way when the engine warmed up and the oil circulated a bit but no such luck. I got the oil changed. That didn't really help either.
I decided this wasn't a problem i could tackle. Took it to a local shop a friend said was reliable. After keeping for a whole month the only thing they found was a broken #6 valve spring. i had them replace it. The engine still has audible ticking/chatter that increases with the RPM of the engine. The mechanic said any further repair would require pulling the entire engine, and tearing it down to the block. Looking for anyone who possibly has had any similar experiences. I'm going to the Dodge dealership in Greenville,NC on Friday for a second opinion.

I have video where you can hear the noise, but can't post the url since i'm new here. You can see it on youtube Batbeard's channel.

Last edited by USAFCharger : 01-13-2011 at 04:01 PM.
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Dodge4L1fe
 
 Posted: 01-13-2011, 04:05 PM
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Post #2

Here's the video:



Wish I could help you out, but I haven't had any experience with any Hemi engine problems. Hopefully others will chime in for you.
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Dodge4L1fe
 
 Posted: 01-13-2011, 04:14 PM
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Post #3

How many miles are on the engine?
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USAFCharger
 
 Posted: 01-13-2011, 04:23 PM
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Post #4

just under 122K
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Dodge4L1fe
 
 Posted: 01-13-2011, 04:27 PM
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Post #5

Quote:
Originally Posted by USAFCharger View Post
just under 122K
Man you sure got your use out of that engine. A lot of people have had this happen before hitting 100K.

The valve spring tick ("Hemi tick") plaques many of the early 2nd Generation Durango vehicles. Those who have thrown a rod or broke a valve spring have either gone through the repairs or replaced the engine with a different hemi.

Did that first mechanic who said the engine would have to be pulled give you any kind of quote?
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USAFCharger
 
 Posted: 01-13-2011, 04:32 PM
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Post #6

Nah I was fed up with the customer service of that particular shop. There was a big lack of communication, they had the truck for over a month and never notified me of anything going on with it, I always had to call or go to the shop myself.
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Dodge4L1fe
 
 Posted: 01-13-2011, 04:35 PM
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Post #7

Was the valve replaced before or after that video was shot?

This is just a guess, but maybe there's a broken rod in there? I really don't know...
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USAFCharger
 
 Posted: 01-13-2011, 04:51 PM
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Post #8

The vid was made after the spring was replaced. I'm hoping the dealership can tell me something about it tomorrow.
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Dodge4L1fe
 
 Posted: 01-13-2011, 05:10 PM
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Post #9

To me it sounds like a broken rod, but the only way to know is to pull the valve covers off.
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MJB8
 
 Posted: 01-13-2011, 07:19 PM
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Post #10

A motor will not ever run with a broken rod. Rod knock from a worn wrist pin is a lower pitched sound. Worn crank bearings are more of a thump.

That sounds like lifter clatter. you may have a flat cam lobe. Some where in there is alot of excess clearance. I didnt see you said the oil light was on but you may have very low oil pressure.

Good luck,

Final answer valve train problem.
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Don Fox
 
 Posted: 01-15-2011, 10:56 PM
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Post #11

USAF:

In any case, you need to get this checked out ASAP!!!!!! The valve springs on the early Hemi engines were problematic. You may have another damaged spring ready to collapse at any moment dropping a valve into the motor and destroying it!!!!!

If if were me, I would at minimum replace all valve springs and evaluate the valve train for other damage.

Possibly it may be more economical to just replace the engine. Good luck with this. Please keep us posted.

Don
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MileHighRango
 
 Posted: 01-17-2011, 11:14 AM
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Post #12

Sounds like it might be a horrible case of the "Hemi Tick". Check all the exhaust bolts and studs and see if you can see anything missing. If so that might be the cause of the sound.
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PDFrogman
 
 Posted: 01-17-2011, 03:23 PM
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Post #13

same noise after a start up this is the result #7 rod
198K synthetic oil changed every 6K
rod came through the block
replaced the motor should have the truck back later this week
Attached Images
File Type: jpg broken rod.jpg (61.7 KB, 5 views)
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Dodge4L1fe
 
 Posted: 01-17-2011, 05:17 PM
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Post #14

Holy cow!
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Don Fox
 
 Posted: 01-18-2011, 12:09 PM
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Mile High:

To me that sound is quite a bit more than just a "tick" To me, the tick would sound more like an exhaust leak which both the 4.7 and 5.7 engines are known for.

My assessment of Frogman's picture is that the piston hit something which stopped it, and being the weaker of the two pieces the rod then twisted and shattered/broke.

If you think about it, having fluid in the cylinder ie antifreeze or water would do it. Is in my case, the valve spring collapsing and allowing the valve to drop into the cylinder could also cause it.

MJB8: An engine sure can run with one and more broken rods, it just won't run right or very smooth!

As along as one or two cylinders will fire properly, and there is no physical obstruction to stop the crank from rotating, it will run.

Don
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KC_Metal
 
 Posted: 01-18-2011, 12:58 PM
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Post #16

Quote:
Originally Posted by USAFCharger View Post
My wife got in her truck one mornign last month to go to work. She came in telling me it wouldn't start. It was cold and the truck hadn't been run all weekend. I figured it was the battery at first. Went to check for myself, and the starter was was attempting to turn the engine over. Tried it a couple more times and the engine finally turned over and started, but the engine had a wicked chatter that increased as the engine RPM increased. I checked the oil and it was a quart or so low. I figured the chatter would go way when the engine warmed up and the oil circulated a bit but no such luck. I got the oil changed. That didn't really help either.
I decided this wasn't a problem i could tackle. Took it to a local shop a friend said was reliable. After keeping for a whole month the only thing they found was a broken #6 valve spring. i had them replace it. The engine still has audible ticking/chatter that increases with the RPM of the engine. The mechanic said any further repair would require pulling the entire engine, and tearing it down to the block. Looking for anyone who possibly has had any similar experiences. I'm going to the Dodge dealership in Greenville,NC on Friday for a second opinion.

I have video where you can hear the noise, but can't post the url since i'm new here. You can see it on youtube Batbeard's channel.
Dude! You are so damn lucky you didn't drop a valve. If you pull the engine apart put in 6.1L valve springs. You are not the first to have a valve spring fail in a Hemi. You might be able to pressurize the cylinders and replace the valve spring without pulling the heads.
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KC_Metal
 
 Posted: 01-18-2011, 01:01 PM
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Post #17

Quote:
Originally Posted by PDFrogman View Post
same noise after a start up this is the result #7 rod
198K synthetic oil changed every 6K
rod came through the block
replaced the motor should have the truck back later this week
SOB!!! That's a nice broken piston rod.
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KC_Metal
 
 Posted: 01-18-2011, 01:02 PM
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Post #18

Quote:
Originally Posted by Don Fox View Post
Mile High:

To me that sound is quite a bit more than just a "tick" To me, the tick would sound more like an exhaust leak which both the 4.7 and 5.7 engines are known for.

My assessment of Frogman's picture is that the piston hit something which stopped it, and being the weaker of the two pieces the rod then twisted and shattered/broke.

If you think about it, having fluid in the cylinder ie antifreeze or water would do it. Is in my case, the valve spring collapsing and allowing the valve to drop into the cylinder could also cause it.

MJB8: An engine sure can run with one and more broken rods, it just won't run right or very smooth!

As along as one or two cylinders will fire properly, and there is no physical obstruction to stop the crank from rotating, it will run.

Don
I have the exhaust leak tick and alot of Hemi's have it. Broken manifold bolts are very common FYI.
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MJB8
 
 Posted: 01-18-2011, 01:20 PM
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Post #19

Quote:
Originally Posted by Don Fox View Post
Mile High:

To me that sound is quite a bit more than just a "tick" To me, the tick would sound more like an exhaust leak which both the 4.7 and 5.7 engines are known for.

My assessment of Frogman's picture is that the piston hit something which stopped it, and being the weaker of the two pieces the rod then twisted and shattered/broke.

If you think about it, having fluid in the cylinder ie antifreeze or water would do it. Is in my case, the valve spring collapsing and allowing the valve to drop into the cylinder could also cause it.

MJB8: An engine sure can run with one and more broken rods, it just won't run right or very smooth!

As along as one or two cylinders will fire properly, and there is no physical obstruction to stop the crank from rotating, it will run.

Don
"Broken rods and no physical obstruction" is a very rare occurnace. The motor will still run when a rod comes through the block as well but not to often.
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KC_Metal
 
 Posted: 01-18-2011, 01:23 PM
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Post #20

Quote:
Originally Posted by MJB8 View Post
"Broken rods and no physical obstruction" is a very rare occurnace. The motor will still run when a rod comes through the block as well but not to often.
That's nasty $hit!
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